第19卷第9期 2011年9月
文章编号
1004-924X(2011)09-200608
光学精密工程
Optics and Precision Engineering
Vol. 19
No,9 Sep.2011
镍金属保护光纤布拉格光栅的热处理及高温传感
饶春芳1,2·，张华，冯艳，肖丽丽"，叶志清2
（1.南昌大学机电工程学院机器人与辉接自动化重点实验室，江西南昌330031； 2.江西师范大学物理与通信电子学院光电子与通信重点实验室，江西南昌330022）
摘要：为了改善镍保护后光纤布拉格光概（FBG)的高温传感性能，即降低其回程误差，减少其升温与降温灵敏度的差异，本文研究了产生这些现象的原因，认为其主要源于化学镀结合电镀镍过程中的残余应力。讨论了残余应力产生的机理，提出了适用于镍金属保护FBG的热处理方法。三次将金属镍保护后的FBG放置在120C恒温炉中保温8h后随炉冷却，对热处理前后的镍保护布拉格光纤光栅进行100～300C的循环温度传感对照实验。结果显示；热处理前回程误差为6.64%，升温与降温灵敏度有较显著差异，且放置率个月后再次进行传感实验其特性也没有改善；热处理后，回程误差降到3.62%，升温灵敏度为22.84pm/C，降温灵敏度为22.76pm/C。实验表明，经适当热处理后的镍保护布拉格
光纤光栅的实际工作温度可扩展到300C，且具有较高的传感精度。关键调：纤维光学；光纤布拉格光；高温传感；热处理；镍涂敦层
中图分类号：TN253;TG156.1
文献标识码：A
doi:10. 3788/OPE, 20111909. 2006
HeattreatmentonfiberBragggratingwith Nicoatingforelevatedtemperaturesensor
RAO Chun-fangl-z· ,ZHANG Hua',FENG Yan',XIAO Li-li',YE ZHi-qing
(l.Key Laboratory of Robot & Welding Automation,School of Mechanics Engineering
Engineering,NanchangUniversity,Nanchang330031,China;
2.KeyLaboratoryof Optoelectronics&Communication,CollegeofPhysicsand Communication
Electronics,JiangziNormalUniversity，Nanchang330022,China)
*Correspondingauthor,E-mail:rcfo332@163.com
Abstract: To improve the sensing characteristics of a Fiber Bragg grating(FBG) temperature sensor with a Ni coating , the causes of the hysteresis error and the difference of sensitivities when it was heated and cooled were researched. Results indicate that the residual stress induced by electroless-e lectroplating makes the sensor imprecise. The mechanism of the residual stress was discussed, then a heat treatment method was proposed for the metallized FBG(MFBG) with a nickel coating. In treat-ment, the MFBG sensor was put in a drying oven at 12o C for 8 hours three times,and every time it was cooled with the oven, A comparison experiment for the MFBG with the nickel coating was per-formed in 100-300 C,results show that the hysteresis error of the sensor is 6. 64%, and the differ
收稿日期：2010-11-24；修订日期：2011-01-24.
基金项目：国家自然科学基金资助项目（No.61067003，50905082，60967002)；江西省自然科学基金资助项目（No
2007GQW0158），江西省研究生创新专项资金立项项目（No.20093559060）